Function toString

external/utf8-cpp-utils/test/doctest.h:1093–1103

template <typename T>
String toString() {
#if DOCTEST_CLANG == 0 && DOCTEST_GCC == 0 && DOCTEST_ICC == 0
    String ret = __FUNCSIG__; // class doctest::String __cdecl doctest::toString<TYPE>(void)
    String::size_type beginPos = ret.find('<');
    return ret.substr(beginPos + 1, ret.size() - beginPos - static_cast<String::size_type>(sizeof(">(void)")));
#else
    String ret = __PRETTY_FUNCTION__; // doctest::String toString() [with T = TYPE]
    String::size_type begin = ret.find('=') + 2;
    return ret.substr(begin, ret.size() - begin - 1);
#endif
}

template <typename T, typename detail::types::enable_if<!detail::should_stringify_as_underlying_type<T>::value, bool>::type = true>
String toString(const DOCTEST_REF_WRAP(T) value) {